package com.itcast.gateway;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Author 尚智江
 * @description
 * @CreateDate 2023/10/19 23:08
 */
@Component
//@Order(-1) // 优先级
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        // 1. 获取请求参数
        ServerHttpRequest request = exchange.getRequest();
        MultiValueMap<String, String> params = request.getQueryParams();
        // 2. 获取参数中的authorization 参数
        String auth = params.getFirst("authorization");
        // 3. 判断参数值是否等于 admin
        if ("admin".equals(auth)){
            // 4. 是 放行
            return chain.filter(exchange);
        }
        exchange.getResponse().setRawStatusCode(401);
        // 5. 否拦截
        return exchange.getResponse().setComplete();
    }

    // 优先级
    @Override
    public int getOrder() {
        return -1;
    }
}
